1 files changed, 6 insertions, 2 deletions
diff --git a/src/libstddjb/pthread_mutex_tailock.c b/src/libstddjb/pthread_mutex_tailock.c
index affa8b3..8f8fbf3 100644
--- a/src/libstddjb/pthread_mutex_tailock.c
+++ b/src/libstddjb/pthread_mutex_tailock.c
@@ -10,15 +10,19 @@
 
 int pthread_mutex_tailock (pthread_mutex_t *mtx, tain const *deadline, tain *stamp)
 {
+  int e ;
   struct timespec ts ;
   tain tto ;
+  if (!stamp) return pthread_mutex_lock(mtx) ;
   tain_sub(&tto, deadline, stamp) ;
   if (!timespec_from_tain_relative(&ts, &tto)) return errno ;
 #ifdef SKALIBS_HASPTHREADMUTEXCLOCKLOCK
   if (&tain_now != &tain_wallclock_read)
-    return pthread_mutex_clocklock(mtx, CLOCK_MONOTONIC, &ts) ;
+    e = pthread_mutex_clocklock(mtx, CLOCK_MONOTONIC, &ts) ;
   else
 #else
-  return pthread_mutex_timedlock(mtx, &ts) ;
+    e = pthread_mutex_timedlock(mtx, &ts) ;
 #endif
+  tain_now(stamp) ;
+  return e ;
 }